在哪里使用linq進行多種條件

Question

我有條件列表，我想在C＃中使用linq做這樣的事情：

var filtred_list = oldList.Where(
    foreach (int condition in conditions) {
        c => c.attribut == condition;
    }
);

謝謝

Answer 1

在您的情況下，只需轉換以下語句即可：

var filtred_list = oldList.Where(
        c => conditions.Contains(c.attribut);
    }
);

Answer 2

使用IEnumerable<T>.Contains(T)方法：

var filtred_list = oldList.Where(c => conditions.Contains(c.attribut));

要么

var filtred_list = from o in oldList
                   where conditions.Contains(o.attribut)
                   select o;

Answer 3

var filtred_list = oldList.Where(x => conditions.Any(c => c.attribut == x));